Feed water heater for steam boilers



UNITED STATES PATENT OFFICE.

WILLIAM DUNN, OF BUFFALO, NEW YORK, ASSIGNOR TO ISAAC BALDlVIN MCQUESTEN, OF HAMILTON, ONTARIO, CANADA.

FEED-WATER HEATER SPECIFICATION forming part of Letters Patent No. 268,203, dated November 28, 1882-.

Application filed September 27, 1882. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM DUNN, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Feed-Water Heaters for Steam-Boilers, of which the following is a specification.

This invention relates to improvements in that class of feed-water heaters which consist 1o of a discharge-nozzle, which is arranged in the steam-space of the boiler and delivers feedwater into the steam-space of the boiler in a more or'less finely divided state, whereby theA feed-water is rapidly heated and its impurities i5 are separated in a granular condition, which permits their ready removal from the boiler by means of the blowoft` cock. Y

The object ot' my invention is to so construct the discharge device that it can be applied and 2o removed from the outside of the boiler, and that its valve can be separately removed when required to be cleaned, and that the valve is held in its seat by gravity, thereby avoiding the use of springs, which are unreliable and apt to become impaired by the heat, and that the feed-water is delivered in the longitudinal direction of'the boiler, thereby preventing it from coming in contact with the sides of the boiler, which would cause incrustations.

3o My invention consists to that end of theim proved constructions which are hereinafter fully described, and pointed out in t-he claims.

In the accompanyingdrawings, Figures l and 2 are sectional elevations of my improved 3 5 device at right angles to each other. Figs. 3, 4, and 5 are horizontal sections in lines a: x, y y, and z z, Fig. 1, respectively.

Like letters of reference refer to like parts in the several figures.

4o A represents the shell of a cylindrical steamboiler. 4

B represents the outer wall of the tubular discharge device, and C a vertical partition arranged in the same, so as to separate the descending passage b from the valve-chamber c. d is the water-inlet, which is connected with the feed-pipe by a union or other suitable coupling.

E represents a cover or cap, which screws 5o into the upper end of the tubular shell B, and

e is a circular plate, which rests upon an annnlar o''set, e', formed in the shell B, and up- A on the upper end of the partition C, to prevent communication between the upper ends of the spaces b and c. A packing of rubber, leather, or other suitable material may be placed under the disk c.

F represents a conical valve, which rests in a seat, f, formed in the lower portion of the valve-chamber c, and g is the valve-stem, eX- 6o tending upwardly in the valve-chamber, and provided with projecting arms g or other suitable devices for guiding the valve in .its movements toward and from its seat.

h h represent the dischargeorilices, arranged in the walls of the chamber c diametrically opposite each other and above the valve F. These orifices are placed in line with the axis of a cylindrical boiler, so that the water issues parallel with the axis of the boiler and 7o not laterally, whereby the feed-Water is prevented from coming. in contact with the descending sides of the boiler, where it would produce incrustations.

The shell B is made cylindrical above the orifices h, and provided at a suitable height with an external screw-thread,t', which screws into an internally-threaded collar, I. Thelatter is secured to the shell A of the boiler and surrounds the openingj, formed .in the same 8o for the insertion of the lower portion of the water-feeder.

After the device is adjusted by the screwst' I, so that the orifices h stand in the desired position, it is secured in place by ajam-nut, J. The lower portion of the outer shell, B, is contracted, as shown in Fig. 2. The feed-water enters through the inlet d, descends through the passage b, rises to the valve F, and raises the same, and escapes through the oriices h 9o into the steam-space of the boiler. The valve F is raised against the steam-pressure under every impulse of the feed-pump or other feed device and seats itself as soon as the impulse ceases, thereby preventing the steam from entering the feed-pipe. The valve tends to seat itself by gravity, thereby rendering the eniployment of a spring for that purpose unnecessary.

The shell B and parts contained therein can roo be readily applied and removed from the outside of the boiler, which is very convenient, as u nder certain circumstances it becomes necessary to remove these parts from time totime forcleaning the same, and the valve can be removed and cleaned Without removing the shell B from the boiler by unscrewing the cap E and removing` the Washer e.

I claim as my invention- 1. The combination,\vith the inclosing` shell B, of a descending passage, b, a valve-chamber, c, provided with one or more dischargeoritlces, 7L, and a valve, F, substantially as set forth.

2. The combination,with the inclosingshell B, of a descending passage, b, and a valvechamber, c, communicating at their lower ends,

' a valve, F, and a removable cap or cover, E,

which permits the removal of the valve, sub- 2o stantially as set forth.

3. The combination, with the inclosing shell B,of a valve,F,and one or more orifices, h, arranged to discharge the Water in the plane of the axis of the boiler only, substantially as set forth.

4, rlhe combination, with the inclosing shell B, provided with a descending passage, b, avalve-chamber, c, and a valve, F, ot' the removable cap E and plate e, covering both the descending passage b and the valve-chamber c, substantially as set forth.

5. The combination,with the inclosing shell B, provided with a descending passage, b, and a valve-chamber, @,Yhaving one or more dis charge-orifices, h, of a valve, F, provided with a stem, g, having projecting guides g',substan tially as set forth.

VILLIAM DUNN.

Witnesses:

JN0. J. BoNNER., GHAs. F. GEYER. 

